13133423221 has 4 divisors (see below), whose sum is σ = 13438851712. Its totient is φ = 12827994732.

The previous prime is 13133423183. The next prime is 13133423249. The reversal of 13133423221 is 12232433131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13133423221 - 2¹⁵ = 13133390453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13133423291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152714181 + ... + 152714266.

It is an arithmetic number, because the mean of its divisors is an integer number (3359712928).

Almost surely, 2^13133423221 is an apocalyptic number.

It is an amenable number.

13133423221 is a deficient number, since it is larger than the sum of its proper divisors (305428491).

13133423221 is an equidigital number, since it uses as much as digits as its factorization.

13133423221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305428490.

The product of its digits is 2592, while the sum is 25.

Adding to 13133423221 its reverse (12232433131), we get a palindrome (25365856352).

The spelling of 13133423221 in words is "thirteen billion, one hundred thirty-three million, four hundred twenty-three thousand, two hundred twenty-one".